package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    //    获取盐
    @Value("${sky.slat}")
    private String slat;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex((password + slat).getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 添加员工
     *
     * @param employeeDTO
     */
    @Override
    public void add(EmployeeDTO employeeDTO) {
//        将employeeDTO转化成employee(会赋值6个属性)实例employee对象
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);
/**
 * 补全数据
 * */
        String md5 = DigestUtils.md5DigestAsHex((PasswordConstant.DEFAULT_PASSWORD + slat).getBytes());
        employee.setPassword(md5);
        employee.setStatus(StatusConstant.ENABLE);
        // employee.setCreateTime(LocalDateTime.now());
        // employee.setUpdateTime(LocalDateTime.now());
        // 从threadlocal中获取员工id
        // employee.setCreateUser(BaseContext.getCurrentId());
        // employee.setUpdateUser(BaseContext.getCurrentId());
        // 调用mapper新增员工数据
        employeeMapper.add(employee);
    }

    /**
     * 员工分页查询
     *
     * @param employeePageQueryDTO
     */
    @Override
    public PageResult page(EmployeePageQueryDTO employeePageQueryDTO) {
//        设置分页查询页码，和每页大小
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
//        执行数据库查询
        List<Employee> employeeList = employeeMapper.findByName(employeePageQueryDTO.getName());

        Page<Employee> page = (Page<Employee>) employeeList;
//        封装PageResult对象进行返回
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 修改员工状态
     *
     * @param employee
     */
    @Override
    public void update(Employee employee) {
//        employee.setUpdateUser(BaseContext.getCurrentId());
//        employee.setUpdateTime(LocalDateTime.now());

        employeeMapper.update(employee);
    }

    /**
     * 根据id查询
     *
     * @param id
     */
    @Override
    public Employee findById(Long id) {
        return employeeMapper.findById(id);
    }

}
